Latch



(Model.)

M. C. NILES'.

l LATCH. No. 269,099. Patented Deo. 12, 1882.

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UNITED STATES PATENT OFFICE.

MILTON O. NILES, OF OAK PARK, ILLINOIS.

LATCH.

SPECIFICATION formingpart of Letters Patent No. 269,099, dated December 12, 1882.

Application ined April 1o, rss2. (Model.)

To all whom it may concern."

Be it known that I, MILTON C. NILEs, ia

` in place, the section of the lock being taken on IHs the line x a: in Fig. l; Fig..3, a detail elevation of the lock with the back plate removed Fig. 4, a plan view ofthe inner or lock-plate knob; Fig. 5, a perspective View of the chock-piece used with the inner knob; Fig. 6, a plan view of the spindle-section belonging to the outer knob; Fig. 7, a detail plan and end elevation of the inner end of the outer knob-shank; Fig. 8, a plan view of the tube which is inserted in the door; and Fig. 9, asection of thesame,taken on the line y yin Fig. 8.

My invention relates to improvements in knob-latches especially adapted to rim-locks, though not entirely restricted to this particular class.

I will proceed to describe in detail the construction, arrangement, and operation of the several devices constituting my present in vention as applied practically in one way, and will then point out definitely in the claims the Y f` special improvements which I believe to be new andwish to protect by Letters Patent.

I may say at the outset that most of the main features of the lock and latch are similar to those shown .in prior patents heretofore granted to me, either alone or `jointly with others, many of them being found in Letters Patent No. 202,574, dated Aprill, 1878, and a special description of all ofthe parts shown in the accompanying drawingstherefore is' not necessary. t i

In the drawings, A represents the lock-case, and A the back plate thereof'. In thisinstance the case is provided with a swinging bolt, B, and actuating-spring b,\and yoked talons C,

` pivoted at one end to the bolt and having the usual cross-bar or yoke-arm, c, on the'other end, against which the cams operate.

thread fitting the thread g2 in the tube.

shown in Letters Patent No. 227,642, granted.

to me May 1S, l880that is,it is provided with a cam, d, on which there is a lug, d', by means of which the shank is secured to the lock-case. the shank having its bearing in the tubular projection a on the outside of the case, and is fastened to the case byinclining it to one side slightly, so that the lug on the cam will pass in through the tubular projection and engage with the inside of the case, as shown in Fig. 2 of the drawings. In order to accomplish this when the projection a is ofsome length it will be necessary to cut a small notch, a', in the casing and extending slightly into th'e projection, through'which the lug may pass. This notch should be located out of reach of the lug in its ordinary working movement, as shown, for instance, in Fig. 3 of the drawings, so that the knob-shank cannot be disconnected from thelock-casewheninthisposition. lnthiscouf struction of the inner end of the knob-shank it is obvious that on one side there is only a short bearing-surface left, the shank being out down considerably on the side opposite the lug to permit the inclination necessary for the inser' tion of the knob into the case, as abovedci and shape as tojust ll the space between the projection aof the shank iush with the inside ofthe lock-case when the shank is in position, l

as shown in Fig. 2 of the drawings. This provides a firm bearing'for the shank throughout the projection. t

A tube, G, is inserted in the door for the reception of the outer knob-shank, being provided with a iiange, g, at its inner end, to prevent its being drawn through' the door, and an lexterior screw-thread, g', on its outer end, for

the recept-ion of a suitable rose, and with an interior screw-thread, g2, near its .inner end, whichservesasthe meanstorfasteningtheouter knob-shank, H, in place. This knob-shankcarries at its outer end the knob H', and at 'its inner end is provided with an exterior screw- The shank does not extend entirely through the IOO ` door, is preferably tubular, and is provided at its inner end with a rectangular recess or opening, h.

The cam, by means of which the bolt is thrown by the outer knob, is made in a separate piece, I, the body of which is round and adapted to enter the inner end of the tube G. On one side of this round body is a rectangular shank, t', of a size and shape adapted to fit the opening'in the end of the knob shank H, and on the other side of this round body is a cam, i', with an outside lug, i2, corresponding to the like parts on the inner end of the opposite knob-shank, and for the same purpose. When attached to the door in working order the cam-piece I is inserted loosely in the knobshank, when obviouslyl it will be turned bythe turning of the knob-shank; but at the same time the two may be readily disconnected, as will be described presently. It is also obvious that the manner of connecting the knob-shank to the tube in the door provides for the ready adjustment of the shank to suit doors of different thickness by simply turning the shank up or back in its screw-threaded seat.4 The shank turns in this seat by the necessary movement for throwing the bolt; but this movement is so slight as not to materially affect the relation of the parts, and the loose connection between the shank and the cam-piece effectually prevents any binding.

A suitable rose, K, is fitted on the knobshank H, and is provided with an internal screw-thread, whereby it is adapted .to be screwed upon the outer end of the tube G ou the outside of the door J, thereby fastening these parts together and providing an outer bearing for the knob-shank.

The parts are mounted in working position o n the door as follows: The inside knob is attached to the lock case, as described, and the chock-piece placed in position, as shown in the drawings, and the back-plate then put 011.

The tube is inserted in the door and the rose piece being passed into the tube and inserted in the end of the outer knob-shank, and the lock-case is then fastened to the door in the usual way, when all the parts will be in working position, as described above and as shown in Fig. 2 of the drawings. The use of the removable chock-piece enables me to provide a close firm bearing for the inner knob-shank at all times, for if it becomes loose through wear the piece is very readily removed and replaced by another which will make the bearing close itting. rIhe side movement of the inner knob4 though the latter construction is preferable, as

it may be cast in the lock-case, and hence more cheaply obtained.

It will be understood of course that the inward adjustment of the independent knobshank is limited, for there must be sufficient space between its inner end and the yoke-arm of the talons to accommodate the body of the cam-piece. f This farthest inward adjustment may be made to conform to the thinnest doors ordinarily used, so that to adapt the knob to other doors it will only be necessary-to make the necessary outward adjustment.

I do not wish to be understood as restricting my improvements to the precise details of construction herein described and shown, for there may be changes made without departing from the characteristics and principles of operation of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The main casing provided with au outside tubular projection, in combination with the bolt-talons C and the knob-shank D, provided with the fastening-lug d on its inner end, and cut away at the side opposite said lug some distance back thereof, whereby the shank may be inclined sufficiently to permit it to be inserted in the projection to engage the lug with IOO the inside of the case, substantially as described. j

2. The lock-case provided with the projection a, in combination with the knob-shank having a bearing in said projection and cut away on one side for a portion of its length, and an independent and removable chockpiece adapted to ll the space between the bearing and the remaining portion of theknobshank, substantially as and for the purposes set forth.

3. The case A, provided with the tubular projection a, in combination wit-h the knobshank D, provided with the cam d and lug d',- and cut away at the side opposite to them, and the independent removable chock-piece F, adapted to fill the bearing at the cut-away end of t'ne knob-shank, substantially as and for the purposes set forth. i l

4. The knob-shank D, cut away at one side on its inner end, in combination with the tubular projection a, in which it has a bearing, the independent chock-piece F, and the talons C, the yoke of which rests against the end of the chock when in position, substantially as and for the purposes set forth.

5. The tube inserted in the door and provided with an interior screw-thread, in combination with the outside knobshank, H, provided with a screw-thread on its iuner end IOS independent bolt-throwing cam loosely connected to and movable lengthwise on the knobshank, whereby the latter may be adjusted lengthwise according to the thickness of the door, substantially as described.

6. The knob-shank H, provided with an angnlar opening or recess at its inner end, in combination with the independent bolt-throwing cam I, provided with an angular shank, z', fitted loosely in the recess in the knob-shank, whereby these two parts are free to move upon each other lengthwise, and mechanism for attaching the knob-shank to the door independently of the cam-piece, substantially as and for the purposes set forth.

7. The tube G, in combination with the knobshank H, independent cam-piece I, and back plate, A', all constructed and operating substantially as described. f

MILTON C. NILES.

Witnesses JN0. 0. MACGREGOR, G. E. FAULKNER. 

